To extend these findings and to identify the most prominent signaling molecules, cytokine arrays of the secretomes of GCT cell lines (TCam‐2, 2102EP, JAR, and 1411H) and TM cells (THP‐1‐MIL4/IL13, JURKAT, HUVEC, and MPAF) have been performed (threshold: > 8500 arbitrary gray value) (Fig. 1E; Fig. S4; Table S3V, labeled in dark red). Here, IL13 is linked to granular cell tumor.